Barack Obama has formally endorsed Joe Biden - his vice president during his time in the White House - for president.

Mr Obama, who was the US president between 2008-16, made the announcement via a video on Tuesday to set out why he believes Mr Biden is the right person to replace Donald Trump in the November elections.

In the 12-minute clip on social media, Mr Obama said: "I believe Joe has all the qualities we need in a president right now."

Image:2012: President Obama and Joe Biden are known to be good friends from their time in office